When you meet CSSMERR_TP_NOT_TRUSTED error when Build & Go with iPhone or iPod. Check, 1. your email and name (including first and last name) match with the information you registered to iPhone Developer Program. 2. WWDR (Apple Worldwide Developer Relations Certification Authority) certificate in keychain as System Default. I had suffered build errors, but solved.
i think, the current major trend among people can't stay as major one anymore. the weak, the mere will be the next major trend. so, following the trend without any own thought will guide you to the gate of the failure. think, don't follow the current flow, change it. no one could see the same light passed already again.